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• W2912460142 abstract "This study describes a novel quencher-free fluorescent method for ochratoxin A (OTA) detection based on the photoinduced electron transfer (PIET) between guanine and fluorophore. In the absence of OTA, carboxyfluorescein (FAM)-labeled aptamer can partly hybridize with the complementary strand of OTA aptamer (OTA-cAPT), which contains four guanines at its 3′-end. As a result, the fluorescence of FAM is quenched due to PIET and stacked guanines. In the presence of OTA, FAM-labeled OTA aptamer can bind specifically to OTA, and thereby the high fluorescence intensity of the dye can be maintained. Under the optimal conditions, the method had a detection limit of 1.3 nM. In addition, the method we proposed is highly sensitive and specific for OTA. Furthermore, the method was proven to be reliable based on its successful application in the detection of OTA in red wine samples. Therefore, this promising, facile, and quencher-free method may be applied to detect other toxins by using other appropriate aptamers." @default.
• W2912460142 created "2019-02-21" @default.
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• W2912460142 date "2019-01-24" @default.
• W2912460142 modified "2023-10-01" @default.
• W2912460142 title "Aptamer-Based Fluorometric Ochratoxin A Assay Based on Photoinduced Electron Transfer" @default.
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• W2912460142 doi "https://doi.org/10.3390/toxins11020065" @default.
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